Table of Contents
How are polygons categorized?
Closed shapes or figures in a plane with three or more sides are called polygons. Polygons first fit into two general categories— convex and not convex (sometimes called concave). Figure 1 shows some convex polygons, some non‐convex polygons, and some figures that are not even classified as polygons.
What are the groups of polygons?
Types of Polygons
- 3 sides – Triangle.
- 4 sides – Quadrilateral.
- 5 sides – Pentagon.
- 6 sides – Hexagon.
- 7 sides – Heptagon.
- 8 sides – Octagon.
- 9 sides – Nonagon.
- 10 sides – Decagon.
How are polygons most commonly classified?
Classifying Polygons A polygon is classified by its number of sides. Here is a table with information on some of the different types of polygons. Polygons have similar names. Look at the name for the shape that has eight angles and sides.
How do u identify a polygon?
A polygon is a two-dimensional closed figure that has three or more straight sides. Any figure with straight edges, such as a triangle or rectangle, is a polygon. Figures that have any curved sides or open sides are not classed as polygons.
What are 3 characteristics of a polygon?
Properties of Polygons
- The number of sides of the shape.
- The angles between the sides of the shape.
- The length of the sides of the shape.
What are the types of pentagons?
Regular polygon
Pentagon/Type
What is a polygon ks1?
A polygon is a flat, two-dimensional (2D) shape with straight sides that is fully closed (all the sides are joined up). The sides must be straight. Polygons may have any number of sides. A polygon. A shape with curved sides is not a polygon.
How do you identify a polygon?
How do you determine if a figure is a polygon?
A polygon is a flat, two-dimensional (2D) shape with straight sides that is fully closed (all the sides are joined up). The sides must be straight. Polygons may have any number of sides. A shape with curved sides is not a polygon.
How do you teach polygons?
Introducing polygons
- Draw a regular pentagon and an irregular pentagon on the board.
- Get your students to count the sides and corners.
- Ask if the sides are the same length on both shapes.
- Emphasize that shapes with 5 sides are pentagons, but if the sides and corners are not equal it is an irregular pentagon.